Question

ammunition 【ammunition】n.弹药；军火The soldiers still had their guns but they were out of ammunition.士兵们空有枪炮却无弹药。

Accepted Answer

[ˌæmju'nɪʃn] 
ammunitionprojectiles to be fired from a gun
Soldiers carry their ammunition: the bullets and shells needed for their guns.
The word ammunition is used to describe the supply of shells or bullets used for a gun, as well as nuclear, chemical or biological matter that can be used in much larger weapons. But we also use it for metaphorical attack material. If you're trying to prove that your big brother is a jerk, your neighbor's story about how he kicked her dog is ammunition for your argument.
All forms of 'ammunition' will appear on average once every 440 pages.ammunition

Front	ammunition
Pron	[ˌæmju'nɪʃn]
Back	【ammunition】 n.弹药；军火 The soldiers still had their guns but they were out of ammunition. 士兵们空有枪炮却无弹药。
Vocab	ammunitionprojectiles to be fired from a gun Soldiers carry their ammunition: the bullets and shells needed for their guns. The word ammunition is used to describe the supply of shells or bullets used for a gun, as well as nuclear, chemical or biological matter that can be used in much larger weapons. But we also use it for metaphorical attack material. If you're trying to prove that your big brother is a jerk, your neighbor's story about how he kicked her dog is ammunition for your argument. All forms of 'ammunition' will appear on average once every 440 pages. ammunition

Ammunition Soldiers Bullets Shells ˌæmju'nɪʃn N.弹药；军火 Guns 士兵们空有枪炮却无弹药